Siemens SINUMERIK 828D Programming Manual page 168

Geometry settings
8.2 Selection of the working plane (G17/G18/G19)
Milling:
Note
The tool length components can be calculated according to the rotated working planes with
the functions for "Tool length compensation for orientable tools".
The compensation plane is selected with CUT2D, CUT2DF. For further information on this
and for the description of the available calculation methods,see Chapter "Tool radius
compensation (Page 289)".
The control provides convenient coordinate transformation functions for the spatial definition
of the working plane. Please see Chapter "Coordinate transformations (frames) (Page 351)"
for more information.
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Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
Fundamentals